Socket for electric heater units.



W.S. HADAWAY,1R. &.l. AMON; SOCKET FOR ELECTRiC HEATER UNITS. APPLICATION FILED SEPT.26. 1913. RENEWED JULY 21.1914.

1 ,1 54,1 1 2 PatentedSept. 21, 1915.

WI TNESSES ATTORNEY WILLIAM S. HADAWAY, JR., OF NEW ROCHELLE, AND JOSEF AMON, OF NEW YORK, N. Y.

SOCKET FOR ELECTRIC HEATER UNITS.

Patented Sept. 21, 1915.

Application filed September 26, 1913, Serial No. 791,936. Renewed July 21,1914. Serial No. 852,315.

To all whom it may concern Be it known that we, WILLIAM S. HAD- AWAY, J in, a citizen of the United States of America, and a resident of New Rochelle, county of Vestchester, and State of New York, and Josiah AMoN, a subject of the Crown of Austria-Hungary, and a resident of the borough of Bronx, New York, N. Y., have invented certain new and useful Improvements in Sockets for Electric Heater Units, of which the'following is a specification, reference being had to the accompanying drawings, forming a part thereof.

Our invention relates to electric apparatus and particularly to fixtures or sockets for supporting removable heater units.

One object of our invention is to provide a simple and durable structure of the aforesaid character that shall be relatively inexpensive to construct and practically unaffected by high temperatures.

Other objects and advantages of our invention will be set forth hereinafter and we will describe our invention in the following specification and point out the novel features thereof in appended claims.

Referring to the drawings: Figure 1 is an ;levation and Fig. 2 is a plan view of a fixture or socket arranged and constructed in accordance with our invention. Fig. 3 is a sectional elevation of the socket of Figs. 1 and 2, drawn to a larger scale in order to disclose its structure in detail.

The structure illustrated comprises a base plate 10, a socket 15 and a pair of terminal members 20 and 25. The base plate 10 is triangular and is provided with a central circular aperture 11 and an annular flange 12. The socket is substantially cup-shaped and is provided with a flange 16 at the top and an aperture 17 in the center of its base. Its side walls are helically corrugated at 18 to provide internal screw threads into which a correspondingly threaded plug may be inserted.

The terminal 20 has a substantially circular base 21 having a central aperture 22 and an arm 23 which is at an angle to the base and to which is secured an attaching bolt 24: for establishing a connection with a circuit conductor. The terminal 25 is similar to the terminal 20 except that its base 26 is smaller than the base 21 and has a relatively small central hole 27 The socket 15 is materially smaller than the aperture 11 in the base 10, through which it extends. hefiang'e 16 of the socket is clamped between a pair of relatively rigid insulating washers 13 and 14; which are shaped to conform to the base 10. They are rigidly attached to each other and to the'triangular'base by hollow rivets 19 which extend through suitable perforations near the corners of the base.

The base 21 of the terminal 20 is secured, and electrically connected to the bottom of the cup-shaped socket by rivets 28, the arrangement of parts being such that the holes 17 and 22 register. An insulating washer 29 is fitted into the bottom of the socket and an insulating washer 30 fits over the base 21 of the terminal 20. These washers are clamped "in position by a central hollow rivet 31 which extends through suitable central holes in the insulating washers 29 and 30 and through the hole 27 in the terminal member 25. The terminal members are thus securely clamped in position while at the same time, they are insulated from each other, the terminal 25 being also insulated from the socket since the rivet 31 is materially smaller than the holes 17 and 22 and extends through them centrally.

The hollow rivet 31 is preferably headed over metal washers 32 and isarranged to constitute a contact member in the bottom of the socket for engaging a corresponding contact in the end of-a plug which may form a part of a heaterunit.

The arrangement of the washers 13 and 14 and the rivets 19 is such that the base 10 is insulated from the socket although the parts are mechanically attached. The socket fixture illustrated may be used forany purpose for which it is suitable, but it is particularly well adapted for use in connection with heater units which are used either singly or in groups.

The triangularbase serves to stiffen the structure materially and provide the ready means for attaching the fixture to a stationary'support, since screws or bolts may-readily be driven through the hollow ritets 19. Furthermore, the .sockets may be assembled very close together on account of their triangular shape. The flange 12 is particularly advantageous, when the socket is attached to a metal support as is frequently,

the case, since it serves to center the socket and prevent the grounding of the walls of the thimble.

For the insulating washers, we prefer to utilize mica laminations in order that the fixture may not be injured when subjected to relatively high temperatures, although other materials may be employed.

The metal washer 32 which is ad]acent to the terminal member 25 maybe omitted if I as are indicated in the appended claims.

What we claim is: v 1. A fixture comprising a triangular metal 'base having a centrally located, circular aperture and an annular flange at the aperture, a cup-shaped socket having helically corrugated side walls arranged to provide internal screw-threads, a top flange and an aperture in the bottom; a terminal having an annular base secured to the bottom of the socket and an attaching member for a circuit conductor, a second terminal, insulating washers located respectively in the bottom of the socket and over the annular base on the first named terminal, and a central rivet for attaching the second terminal to the socket and clamping the insulating washers in position to electrically separate the central rivet and the second terminal from the socket; relativelv rigid insulating washers adapted to clamp the socket flange between them and shaped .to substantially conform to the base plate, and hollow rivets for attaching the washers at the corners of the triangular base.

2. A fixture comprising a polygonal metal base having a centrally located aperture and a flange at the aperture, a socket arranged to provide internal screw threads and having a top flange and an aperture in the bottom, a terminal secured to the bottom of the socket, a second terminal, insulating washers located respectively in the bottom of the socket and between. the terminals and a rivet for mechanicallv attaching the second terminal to the socket and clamping the insulating washers in position; relatively rigid insulating washers adapted to clamp the socket flange between them and shaped to substantiallyconform to the base plate, and

hollow rivets for attaching the washers at Copies 0! this patent may be obtained for the corners of the polygonal base.

3. A fixture comprising a triangular base having an aperture, a cup-shaped socket materially smaller and extending through the aperture in the base and arranged to provide internal screw threads and having a top flange and aperture in the bottom, terminals having perforated bases, the base of one being secured to the bottom of the socket, insulating washers for spacing the terminals apart and a central rivet for attaching the terminals to the socket and clamping the insulating washers in position, and means for mechanically attaching .the socket flange to the base and electricallv separating between the parts.

t. A fixture comprising a triangular metal base having an aperture, a cup-shaped socket having helically corrugated side walls arranged to provide internal screw-threads, a top flange and an aperture in the bottom,

- a perforated terminal secured to the bottom of the socket, a second terminal; means for attaching the second terminal to the socket and electrically separating ittherei'rom, and means for securing the socket flange to the base and electrically separating between the parts.

5. A fixture comprisinga polygonal metal base having acentrally located circular aperture, a cup-shaped socket having helically corrugated side walls arranged to provide internal screw threads, means for mechanically connecting the socket to the base and electrically separating between them, and a pair of terminal members both of which are secured to the socket and one of which is electrically separated from the socket.

6. A fixture comprisinga polygonal metal base having a central aperture, a socket, means for mechanically connecting the socket to the base and electrically separating between them, and a pair of terminal members both of which are secured to the socket and one of which is electrically separated from the socket.

7 A fixture comprising a flanged metal socket, a metal base therefor, means to reinforce said flange and secure the socket to the base, and a pair of terminal members, both of which are secured to the socket and one of which is electrically separated from the socket.

8. A. fixture comprising a flanged metal socket; a metal reinforcing ring rigidly secared to and insulated from the flange, and

a pair of terminal members secured to the bottom of the socket, and means for insulating one of them from the socket, said fixture being adapted to be supported by said metal ring.

In witness whereof, We have hereunto set our hands, this 24th day of September, 1913, in the presence of two subscribing witnesses.

WILLIAM S. HADAVVAY TR. JOSEF AMON. Witnesses:

G. R. QUIMBY, F. B. GRAvns.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

